diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index fcc9d78..465d376 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -145,7 +145,7 @@
 // callbacks
 // ---------------------------------------------------------------------------
 
-void Layer::onLayerDisplayed(const sp<const DisplayDevice>& hw,
+void Layer::onLayerDisplayed(const sp<const DisplayDevice>& /* hw */,
         HWComposer::HWCLayerInterface* layer) {
     if (layer) {
         layer->onDisplayed();
@@ -418,7 +418,7 @@
     layer.setBuffer(mActiveBuffer);
 }
 
-void Layer::setAcquireFence(const sp<const DisplayDevice>& hw,
+void Layer::setAcquireFence(const sp<const DisplayDevice>& /* hw */,
         HWComposer::HWCLayerInterface& layer) {
     int fenceFd = -1;
 
@@ -442,14 +442,20 @@
 // ---------------------------------------------------------------------------
 
 void Layer::draw(const sp<const DisplayDevice>& hw, const Region& clip) const {
-    onDraw(hw, clip);
+    onDraw(hw, clip, false);
 }
 
-void Layer::draw(const sp<const DisplayDevice>& hw) {
-    onDraw( hw, Region(hw->bounds()) );
+void Layer::draw(const sp<const DisplayDevice>& hw,
+        bool useIdentityTransform) const {
+    onDraw(hw, Region(hw->bounds()), useIdentityTransform);
 }
 
-void Layer::onDraw(const sp<const DisplayDevice>& hw, const Region& clip) const
+void Layer::draw(const sp<const DisplayDevice>& hw) const {
+    onDraw(hw, Region(hw->bounds()), false);
+}
+
+void Layer::onDraw(const sp<const DisplayDevice>& hw, const Region& clip,
+        bool useIdentityTransform) const
 {
     ATRACE_CALL();
 
@@ -540,16 +546,17 @@
     } else {
         engine.setupLayerBlackedOut();
     }
-    drawWithOpenGL(hw, clip);
+    drawWithOpenGL(hw, clip, useIdentityTransform);
     engine.disableTexturing();
 }
 
 
-void Layer::clearWithOpenGL(const sp<const DisplayDevice>& hw, const Region& clip,
-        float red, float green, float blue, float alpha) const
+void Layer::clearWithOpenGL(const sp<const DisplayDevice>& hw,
+        const Region& /* clip */, float red, float green, float blue,
+        float alpha) const
 {
     RenderEngine& engine(mFlinger->getRenderEngine());
-    computeGeometry(hw, mMesh);
+    computeGeometry(hw, mMesh, false);
     engine.setupFillWithColor(red, green, blue, alpha);
     engine.drawMesh(mMesh);
 }
@@ -559,12 +566,12 @@
     clearWithOpenGL(hw, clip, 0,0,0,0);
 }
 
-void Layer::drawWithOpenGL(
-        const sp<const DisplayDevice>& hw, const Region& clip) const {
+void Layer::drawWithOpenGL(const sp<const DisplayDevice>& hw,
+        const Region& /* clip */, bool useIdentityTransform) const {
     const uint32_t fbHeight = hw->getHeight();
     const State& s(getDrawingState());
 
-    computeGeometry(hw, mMesh);
+    computeGeometry(hw, mMesh, useIdentityTransform);
 
     /*
      * NOTE: the way we compute the texture coordinates here produces
@@ -634,10 +641,12 @@
 // local state
 // ----------------------------------------------------------------------------
 
-void Layer::computeGeometry(const sp<const DisplayDevice>& hw, Mesh& mesh) const
+void Layer::computeGeometry(const sp<const DisplayDevice>& hw, Mesh& mesh,
+        bool useIdentityTransform) const
 {
     const Layer::State& s(getDrawingState());
-    const Transform tr(hw->getTransform() * s.transform);
+    const Transform tr(useIdentityTransform ?
+            hw->getTransform() : hw->getTransform() * s.transform);
     const uint32_t hw_h = hw->getHeight();
     Rect win(s.active.w, s.active.h);
     if (!s.active.crop.isEmpty()) {